Find solutions for Xbox account and profile issues, manage settings, and get support for your Xbox experience.

查找 Windows 7 或 Windows 8.1 的产品密钥 卸载或重新安装 Windows 7 或 Windows 8.1 时，通常需要产品密钥。 通常，如果购买的是实物 Windows 拷贝，产品密钥应该在标签上或者在 Windows 随附包装盒中的卡上。 如果 Windows 已预先安装在计算机上，产品密钥应显示在设备标签上。 如果你丢失了或者无法找到产品 ...

Check the Xbox services, games, and apps for any service outages.

Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.

Training: Get started with SharePoint in Microsoft 365. At office.com, sign in to SharePoint, then select the SharePoint tile.

适用于预览体验成员 Xbox Insider Program 是为你打造的！在电脑、Xbox 主机或移动设备上，您可以提前访问新游戏和新功能，与我们的开发合作伙伴一起参与游戏测试，并提供有价值的反馈，帮助塑造 Xbox 体验。你的反馈甚至可以为你赢得额外的经验值！

了解有关如何在 Xbox 上参与游戏 beta 版测试或者玩演示版，或试玩版游戏的详细信息。

Learn how to find a Windows product key for activation, and when you'll use a digital license instead.

Microsoft account sign-in helper If you can't sign into your Microsoft account, use the sign-in helper to identify the problem. How to use the Microsoft account sign-in helper The tool will ask you to enter the email address or mobile phone number you're trying to sign in with and check the details you provide. If it detects a problem with your account, we'll tell you what you need to do to ...

若要获得 Xbox 主机的亲自服务，您可以访问Microsoft授权服务提供商，以获取由受信任的专家使用正版Microsoft更换部件执行的优质服务。